select
    ORDERS_DTL.ITEM_CODE as CODE
    ,ifnull(ITEM.ITEM_NAME, 'NULL') as NAME
    ,sum(ORDERS_DTL.ORDER_QTY) as SUM_QTY
from ORDERS
inner join WAREHOUSE on ORDERS.WH_CODE = WAREHOUSE.WH_CODE
inner join ORDERS_DTL on ORDERS.ORDER_NO = ORDERS_DTL.ORDER_NO
inner join ITEM on ORDERS_DTL.ITEM_CODE = ITEM.ITEM_CODE
group by ORDERS_DTL.ORDER_QTY
having sum(ORDERS_DTL.ORDER_QTY) >= 50
order by SUM_QTY desc, CODE desc
;